Lock



July 24, 1928,

R. E. RowN LOCK Filed July '27, 1927 'Watented July 24, 1928.

UNITED STATES ROY 'E. BROWN, 0F PORTLAND, OREGON, ASSIGNOR OF FORTY-NINE PER CENT T0 PERCY C. CAFFEE, OF

' 1,678,420 PATENT OFFICE.

PORTLAND, OREGON.

LOCK.

Application filed July 27,

This invention relates to door locks and has special reference to locks of the type shown in Letters Patent, No.v 1,342,157, granted to me June 1, 1920. .The present invention providesan improved means for preventing the retraction of the bolt from the outside-of the door. and also provides improved means for setting the tumblers whereby the pull bar may be actuated to retract the bolt from the. outside of the door. The invention also provides an improved form' of bolt whereby the bolt may be reversed accordingly as the door swings to the right or. the left. The invention is illus-- trated in the accompanying drawing and consists in certain novel features which will be first fully described and then more particularly defined in the appended claims.

In the drawing: i

Figure .1 is an elevation, partly in section, of a lock. constructed in accordance with the present invention, the face plate of the lock being removed;

Fig. 2is a vertical section on the line 2-2 of Fig. 1, and y Fig. 3 shows the dead latch in detail.

Thelock case 1 may be of the usual form and the bolt 2 is slidablymounted in the upperportion of the case, as shown clearly in Fig. 1. The head of the bolt is supported by a slot in the end of the casing in the usual manner and the shank 3 is provided with a longitudinal slot 4 through which a supporting pin or rod 5 passes to guide the bolt and prevent it dropping within the lock case. The pin 5 is, of course, secured at its ends in the face plates of the lock casing. and passes through the slot 4. so that it serves as a support and a guide for the bolt and also as a means to limit the movement of the bolt whereby jamming of the parts and consequent bending thereof will be avoided. The shank 3 is provided with a socket 6 in its inner extremity to receive one end of an expansion spring 7 which is held by the said socket and bears against the end of the lock casing, as clearly shown in Fig. 1, so that it tends constantly to project the. bolt, and between the inner end of the slot 4 and the said socket 6 the upper and lower edges of the bolt are shaped to providenotchesS and define shoulders 9, the function of which will presently appear. The inner end of the bolt head 2 isformed wit-h notches 10 which define sockets adapted to receive the 1927. Serial No. 208,854.

correspondingly shaped enlargement 11. at the outer end of adrawbar or lever 12 so that the said drawbar or lever will be held in engagement with the bolt and will travel withit. It will bereadily noted that the enlarged end of the drawbar may be engage d in either socket 10' and will be held thereinby the sides of the casing so that the bolt may bereversed when necessary and will operate in the same manner whichever edge of. the bolt is uppermost.

The drawbar 12is intended to be actuated by tumblers 13 mounted in the lower portion of the lock case. These tumblers in thepresent lock are carried by the knob spindle 1a which passes through the lock and through the door 40 and is equipped at each end with a knob 15. The outer tumblerl3 is mounted directly upon thespindle so as to rotate therewithand is constructedwith an extended hub member 16 having a flatsided borewhereby it will be caused to turn with the spindle while the intermediate and inner tumblers are loosely mounted upon a sleeve or bushing 17 which is carried by the inner face plate of the lock, as shown in Fig. 2, the bushing being inserted through the said face platefrom the outer side thereof and then upset -against the same, as shown at 18. The several tumblers are separated by spacing washers 19 and are provided upon their opposed faces with lugs 20 whereby the combination ofthe lockmay be varied and operated in the same manner as set forth in my above mentioned patent; The tumblers are constructed in their peripheries with notches 21 to be engaged by the beak 22 of the drawbar 12 when thebolt is to be re tracted from the outside of the door through the manipulation of thetumblers, itibeing understood that whenthe tumblers have been properly operated according to'the combination of the lock, the several notches 21 will be brought into alinement below the beak 22 which will then at once drop into engagement withthe notches. On the outer face of the outer tumbler '13, thereisprovided a ratchet or notched disk 28, the notchesof which correspond in number and arrangement to the lug receiving openings 2 1 inthe tumblers, and this disk is engaged by a resilient pawl 25 secured at oneendin the lock case and engaging the notchesinthe periphery of the said disk so that as the disk'and the tumbler are rotated thepawl Willmake a clicking sound as it moves into engagement with the successive notches. The operator will be thereby enabled to operate the combination of the lock in the dark by counting the clicks, and it WlllIlOt be necessary for him to read the dials 26 which are provided upon the knob spindle adjacent the inner end of each knob hub. It will be understood that when the tumblers are not set in accordance with the combination there will always be at least one tumbler presenting a portion of its periphery across the notches of the other tumblers and, consequently, the drawbar 12 cannot drop into engagement with the tumblers and rotation of the knob spindle by one who does not know the combination will not affect retraction of the bolt.

The drawbar 12 is, of course, disposed between the bolt and the tumblers, as shown in Fig. 1, and it is provided upon its upper edge with a shoulder 27 adapted to be engaged by a dog or dead latch 28 which is pivotally mounted in the lock case whereby it may be so disposed that its free end will abut the shoulder 27, as shown in Fig. 1, and thereby prevent retraction of the draw bar and, of course, arevent retraction of the bolt. The turning shaft 29 of this dead latch or dog is extended through the inner side of t'he lock and equipped with any convenient form of handle 30 whereby it may be pivotally swung when desired, and within the look a brake spring 31 is mounted having its free end 32 arranged to bear upon the pivoted end of the dog so that the dog will be yieldably heldin any position to which it may be turned, and it may be here noted that the dog is of such dimension and so located that if it be turned to a horizontal position as shown in Fig. 1, it will abut the shoulder 27 and prevent operation of the look while if it be swung upwardly it will play in a notch 8 of the "bolt and bear against the shoulder 9 so that it will retract the bolt against the-tension of the spring 7 the drawbar 12 then riding idly on the peripheries of the tumblers. As the handle is at the inner side of the door, itwill be seen at once that thedoor may be always opened -from the inside and the person can never be locked in the room.

'ljhedead latch is provided with trunnions or ournals 32 on its side edges at its pivoted end which are rotatably engaged in openin s provided therefor in the sides of the lock casing and slots or notches 83 extend diametricallyiacross the trunnions to be engaged by a diametrically disposed lug 34 on the turningsha ft 29 whereby the lock may be fitted to a door swinging either to the rightor to the left without shifting the latch. The turning shaft, as shown clearly in Fig. 3, .is formed with a reduced terminal por tion 35 adapted to pass into an opening 36 through the dead latch concentric with the trunnions 32 so that the axial alinement of the shaft and the trunnions will be maintained and the bending strain upon the shaft and the lug 84: will be minimized. The outer portion of theshaft is rotatably mounted in the inner escutcheon plate 37 and is held against 'endwise movement by the handle drawbar connected therewith, a plurality of tumblers disposed below the drawbar and arranged to be engaged thereby, a knob spindle, a hub member fixed to the outer tumbler and engaged with the knob spindle whereby to rotate therewith, abushing fit ted around said hub member and held against rotation, the intermediate and outer tumblers being loosely mounted upon said bushing, a ratchet fixed to the outer face of the outer tumbler, and a detent engaging said ratchet disk.

2. In a lock, the combination of a bolt provided with a head and a reduced shank extending inwardly from the head, the bolt being provided with sockets at each side of the shank, a drawbar engageable in either socket to move with the bolt, a plurality of tumblers disposed below the drawbar to be engaged thereby for withdrawing the bolt, means yieldably holding the bolt projected, and a latch member mounted between the bolt and the drawbar and engageable with the drawbar to maintain the bolt projected or with the bolt to retract the bolt.

3. In a lock, the combination of a slidable bolthaving notches and transverse shoulders on its upper and lower edges, means for yieldably holding the bolt projected, a drawbar engageable with the bolt to move therewith, a plurality of tumblers disposed below the drawbar and engageable thereby for retracting the bolt, and a latch member pivotally mounted between the bolt and the drawbar and engageable with the drawbar in one position to prevent retraction of the bolt and in another position engageable with the shoulder on the 'bolt to retract the same.

4. In a lock, the combination of a slidable bolt, means for yieldable holding the bolt projected, a drawbar disposed below the bolt and engageable therewith to move with the bolt, said drawbar having a shoulder on its upper-edge, a pluralityof tumblers disposed below the drawbar to be engaged thereby for retracting the bolt, and a latch member pivotally mounted between the bolt and the drawbar and adapted in one position to engage the shoulder on the drawbar and prevent retraction of he bolt and in another position to engage the "bolt and "retract the same.

5. In a lock, the combination of a slidable the lock and constructed with diametrical bolt, a drawbar fitted to the bolt to move notches, and a turning shaft rotatably sup- 10 therewith, means for actuating the drawbar ported at one side of the lock and having a to retract the bolt, a dead latch between the lug engageable in the notch in either trun- 5 bolt and the dravvb'ar engageable with the nion of the latch.

bolt to retract the same or With the drawbar In'testimonywhereof I'afix my signature. to prevent retraction of the bolt, said latch v having trunnions journaled in the case of ROY E. BROWN. [L. s.] 

